Landline Phone Problem

[Jimpy2]

I have full fibre 150 with a grandstream for VOIP on my landline phone, my landline phones are a Quad set of BT 8610 phones with a Answer Phone on one base unit which is plugged into the Grandstream, the Grandstream is then plugged directly into a eero unit, all worked OK at start but recently when I get a incoming call not all the phones ring sometimes only 2 then at times 3 and on rare occasions all 4 will ring i have swopped the phones over to different base units but it doesn't seem to make any difference, the phones worked perfectly on incoming and outgoing calls before I went onto full fibre.

[ferguson]

That's an interesting question and I'm not sure. Mine supports three, no problem. The fact that your issue seems sporadic is odd.  

[Jimpy2]

Yes do understand ferguson that the hand sets have nothing to do with TT but haven't got another set to try and don't understand what could make the phones not to ring, have tried resetting the Grandstream a few times but just get same results, is there a limit how many hand sets the Grandstream can handle?

[ferguson]

OK, but I do wonder if the support team can help with third-party equipment such as handsets, let's see what they they have to say. 

[Jimpy2]

All the hand sets show batterys fully charged and ok

[Jimpy2]

Hi Ferguson, 

Yes my first thoughts so replaced the batterys  in all the  hand sets, but can't really say the hand sets are OK but I have changed them about into different bases and still no joy

[ferguson]

Is it possible that the connection between the handsets is at fault, maybe some batteries need checking?